# Waterpik Aquarius WP-660 vs Panasonic EW1511: specs and price compared

A sourced, side-by-side comparison of the Waterpik Aquarius WP-660 (Waterpik) and Panasonic EW1511 (Panasonic) among water flossers. Waterpik Aquarius WP-660 is the cheaper of the two at $99.99.

## Side by side

| Spec | Waterpik Aquarius WP-660 | Panasonic EW1511 |
| --- | --- | --- |
| US price | $99.99 | $109.99 |
| Brand | Waterpik | Panasonic |
| Released | 2013 | 2019 |
| Type | countertop | cordless |
| Tank capacity (ml) | 651 | 200 |
| Pressure settings | 10 | 5 |
| Max pressure (psi) | 100 | 94 |
| Tips included | 7 | 2 |
| Power | corded | rechargeable |
| Runtime min | 1.5 | 1 |

## Key differences

- Type: Waterpik Aquarius WP-660 countertop vs Panasonic EW1511 cordless
- Tank capacity (ml): Waterpik Aquarius WP-660 651 vs Panasonic EW1511 200
- Pressure settings: Waterpik Aquarius WP-660 10 vs Panasonic EW1511 5
- Max pressure (psi): Waterpik Aquarius WP-660 100 vs Panasonic EW1511 94
- Tips included: Waterpik Aquarius WP-660 7 vs Panasonic EW1511 2
- Power: Waterpik Aquarius WP-660 corded vs Panasonic EW1511 rechargeable
- Runtime min: Waterpik Aquarius WP-660 1.5 vs Panasonic EW1511 1

## Sources

- Waterpik Aquarius WP-660: https://www.waterpik.com/products/dental-water-flosser/WP-660/ (waterpik.com, verified 2026-06-19)
- Panasonic EW1511: https://shop.panasonic.com/products/cordless-water-flosser-with-ultrasonic-cleaning (shop.panasonic.com, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/water-flossers/waterpik-aquarius-wp-660-vs-panasonic-ew1511/
Cite: Per The Front Desk Review, Waterpik Aquarius WP-660 ($99.99) vs Panasonic EW1511 ($109.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/water-flossers/waterpik-aquarius-wp-660-vs-panasonic-ew1511/
License: CC BY 4.0.